September 2026
CSS properties that became available in major browsers in September 2026.
overflow-anchor
property
MDN DocumentBrowser Support
Chrome
v56+2017-01-25Edge
v79+2020-01-15Safari
v27+2026-09-14Safari (iOS)
v27+2026-09-14Firefox
v66+2019-03-19
position-anchor
property
MDN DocumentBrowser Support
Chrome
v151+2026-07-28Edge
v151+2026-07-31Safari
v27+2026-09-14Safari (iOS)
v27+2026-09-14Firefox
v151+2026-05-19
progress
type
MDN DocumentBrowser Support
Chrome
v138+2025-06-24Edge
v138+2025-06-26Safari
v26+2025-09-15Safari (iOS)
v26+2025-09-15Firefox
v155+2026-09-01